Dependable; faithful; certain.
And unto the angel of the church of the Laodiceans write; These things saith the AMEN, the faithful and true witness, the beginning of the creation of God; I know thy works, that thou art neither cold nor hot: I would thou wert cold or hot. ( Revelation 3:14-15 )
Bibliography Information"Entry for 'Amen'". A King James Dictionary.